Method for piecing rovings and exchange roving bobbins in a ring spinning frame and working machine for carrying out this method
US4799353A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Aug 25, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H9/005
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for piecing rovings introduced from almost exhausted roving bobbins suspended by two rows of bobbin hangers mounted on a creel of a conventional ring spinning frame provided with a roving bobbin supply rail disposed in front of the creel, with rovings introduced from full packaged roving bobbins previously carried to the respective supply positions of the supply rail, said for exchanging the almost exhausted roving bobbins for the full packaged roving bobbins. A piecing rovings operation is carried out for each pair of almost exhausted roving bobbins suspended by a front row bobbin hanger and a back row bobbin hanger of the creel, facing each other, together with two corresponding adjacent full packaged roving bobbins of the supply rail, respectively. A roving bobbin exchanging operation is carried out for each pair of almost exhausted roving bobbins having completed the roving piecing operation for corresponding full packaged roving bobbins of the supply rail having completed the roving piecing operation. The roving bobbin exchanging operation and the roving piecing operation are performed in parallel and at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.